A body a starts from rest with an acceleration a_(1) . After 2s, another body B starts from rest with an accelerationa_(2). If they travel equal distances in the 5^(th)second after the start of A then, the ratio a_(1) :a_(2)is equal to :

A body a starts from rest with an acceleration a_(1) . After 2s, anoth

1.	A body a starts from rest with an acceleration a_(1) . After 2s, another body B starts from rest with an accelerationa_(2). If they travel equal distances in the 5^(th)second after the start of A then, the ratio a_(1) :a_(2)is equal to :
Answer» ` 9 : 7` `9 : 5` `5 : 7` `5 : 9` SOLUTION :`S_(n) = u +(a)/(2) (2n-1)` `S_(5^(th))(A) = S_(3^(th))(B)` `0 + (a_(1))/(2) [(2 xx5)=1] = 0 +(a_(2))/(2) [ (2xx3) - 1]` `(a_(1)xx9)/(2) = (a_(2) xx5)/(2)` `:. (a_(1))/(a_(2)) = (5)/(9)` `a_(1) :a_(2) = 5:9`